A good traditional IPA is in the 1070-1090OG range, no sugar no grits no crystal
IBUs? Hard to calculate since the more hops you add the less bittering you extract out of them.
My trad IPA was 10K Oz lager malt, to keep the beer pale, wort boiled two hours with 410g whole Goldings. For yeast, Danstar Manchester.
I stuffed up the mash temp, it was 74C not my target 66C
I got 24L at 1084, perfect! Only attenuated to 1032, due to the high mash temp. All Sg samples tasted radical, BTW.
Racked at week one into a corny, shoved in 90g goldings as dryhop, shoved corny into my cellar where it will stay till June when the beer will be bottled, then put away for another few months--trad IPAs (1830s to 1850s) were not drunk till they were 12-14 months old.
The old Burton brewers ensured the beer attenuated right down: they could not risk fermentation continuing in the wooden barrels during the voyage to the tropics. Dryhops were added to the barrels to try and ward off infection, hence also the high alchol.
The barrels were shipped by canal from Burton to Hull. On the docks of Hull a small amount of cane sugar was added to the barrel, to keep the yeast active, again a measure to avoid infection. The barrels were filled 100%full, so any CO2 generated stayed in solution and did not form a pocket of gas and cause the barrel to explode.
Despite all this, a lot of IPA was bad by the time it reached its destination port.
As more and more Indian Civil Servants and soldiers returned to England they wanted their IPA. Since beer sold in England did not need to travel for months, and the brewers did not want to tie up capital in slowly maturing beer, IPA slowly descended in strength and bitterness and became what we now know as bitter.
The IPA guidelines these days describe a shadow of what a real IPA was.
Now, by the time a barrel of IPA reached its destination in India, Oz, NZ, Sth Africa and the US and was fit for drinking, the excessive bitterness had mellowed and the bittering compounds had turned into flavenoids. A very luscious beer. The Pacific NorthWest of the US still produces very hoppy beers for immediate drinking though a lot of the people there mature the bottles for a few years.
There is a book on IPAs by R Protz and C LaPensee available from CAMRA
IPA is a very fascinating subject on its own. It was the first true beer of the Industrial Age, and some of the famous first lager brewers got a lot of inspiration and information from touring Burton breweries.
Jovial Monk